Die for cold extrusion of small-modulus spline

• Main Authors: FANG FEISONG, JIANG ZUZHEN, ZHANG CHUNLING, XIAO YONG, HUANG LONGGUI, YANG KE
• Format: Patent
• Language: Chinese; English
• Published: 29.12.2020
• Subjects: AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL; MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PUNCHING METAL; TRANSPORTING

The utility model provides a die for cold extrusion of a small-modulus spline, which is embedded in a die holder and fixed on a machine tool and comprises a section I guide area positioned at a feed port and an adjacent section II extrusion molding spline area, the tooth profile of each spline tooth in the II-section extrusion molding spline area is composed of a first involute, a first arc section, a second arc section, a third arc section and a second involute, the second arc section and the first involute are in arc transition through the first arc section, and the second arc section and the second involute are in arc transition through the third arc section. The first involute and the first arc section are symmetrically distributed with the second involute and the third arc section respectively and have the same parameters, by improving the mold structure, the tooth profile of the spline teeth in the mold cavity is designed to be in a mode of combining the involute and the arc sections, the metal fluidity